Table 1.

The baseline of the included registered trials.

		Number (n)
The number of registered trials		263
Intervention	Drug therapy	138
	Non-drug therapy	47
	Alternative therapy	78
	Chinese Traditional Medicine	72
	Non-drug therapy in Chinese Traditional Medicine	5
	Other alternative therapy	1
Outcome	Patient-important outcome(s)	70
	Surrogate outcome(s)	193

Drug therapy: Drugs for gastrointestinal disorders; Drugs for blood and blood forming organs; Drugs for cardiovascular; Hormone; Anti-infectious drugs; Antitumor and immune drugs; Nervous system drugs; Antiparasitic drugs; Respiratory system durgs; Other drugs; A combination of the two drugs (western medicine); Triple therapy (western medicine).

Non-drug therapy: Respiratory support; Respiratory rehabilitation training; Dialysis treatment; nutrition support; Psychological therapy; Microecology/Light therapy/Mongolian medicine; Stem cell therapy.

Chinese Traditional Medicine: Traditional Chinese Medicine decoction pieces; Chinese Traditional medicine; Traditional Chinese medicine injection; Combination of Chinese and western medicine.

Non-drug therapy in Chinese Traditional Medicine: Acupoint treatment; Others.

Other alternative therapy: probiotics.

Patient-important outcome(s): Death or cure; Cure rate.

Surrogate outcome(s): Adverse outcomes; Imageological examination; Laboratory examination; Viral Nucleic Acid; Pulmonary function; Measuring scale assessing; Recovery time/length of stay.